The CAS number of Sodium Molybdate Dihydrate (Na₂MoO₄·2H₂O) is 10102-40-6. The molecular weight is 241.95 g/mol and the Mo content in Meghachem's standard specification is 39.00% minimum. The pH of a 5% solution is 7.5 to 9. A Certificate of Analysis confirming all five quality parameters — Mo%, MoO3 content, Loss on Drying, Water Insoluble, and pH — is provided with every shipment.

Sodium Molybdate is an anodic corrosion inhibitor. The molybdate ion (MoO₄²⁻) in aqueous solution adsorbs onto metal surfaces and, under the influence of dissolved oxygen and the local electrochemical potential, promotes the formation of a mixed iron-molybdenum oxide passive film at anodic sites. This film is dense, adherent, and acts as a physical and electrochemical barrier against further metal dissolution. At concentrations typically between 200–1000 ppm in closed-loop systems, Sodium Molybdate provides effective protection for ferrous metals, aluminium, copper, and brass simultaneously. Its compatibility with common organic additive packages — amines, carboxylates, phosphonates — and its low toxicity make it the modern alternative to chromate in central heating and automotive coolant applications.

Sodium Molybdate (Na₂MoO₄·2H₂O) contains sodium as the counter-ion and is preferred in applications where sodium is acceptable in the process or final product — such as corrosion inhibitor formulations, agricultural micronutrient treatments, and molybdate pigments. Ammonium Molybdate [(NH₄)₆Mo₇O₂₄·4H₂O] contains ammonium and is preferred for catalyst preparation and molybdenum metal production, where the ammonium decomposes cleanly upon calcination without leaving sodium residues that could affect catalyst performance. The key decision factor is whether sodium or ammonium ions are compatible with the intended end use.

Meghachem supplies Sodium Molybdate in HM-lined HDPE bags of 25 kg and 50 kg as the standard packing format. The HM (High Molecular weight) polyethylene inner liner provides the moisture barrier protection required for a hygroscopic product like Sodium Molybdate, preventing humidity absorption during shipping and storage. For large-volume industrial buyers, bulk big sack packing of up to 1 MT is available. Custom packing arrangements including specific labelling, documentation language, or non-standard bag sizes can be discussed for qualifying buyers.

Yes. Meghachem exports Sodium Molybdate to more than 25 countries including Germany, Netherlands, Turkey, UAE, Oman, Indonesia, Vietnam, USA, Singapore, Malaysia, United Kingdom, and Japan. All export consignments include a Certificate of Analysis, Material Safety Data Sheet, and country-specific compliance documentation. Dispatch is coordinated directly from our GIDC Vatva, Ahmedabad facility with no third-party trade intermediaries involved in documentation preparation or loading.